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Finding the Fourth Proportional to 391.30, 586.95 and 117.37

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Solution

The fourth proportional to 391.30, 586.95 and 117.37 is: 176.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.30 : 586.95 = 117.37 : x
  2. Step 2: Convert to fraction form
    391.30/586.95 = 117.37/x
  3. Step 3: Cross multiply
    391.30x = 586.95 × 117.37
  4. Step 4: Simplify right side
    391.30x = 68,890.78
  5. Step 5: Solve for x
    x = 68,890.78/391.30
  6. Step 6: Final answer
    x = 176.06

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.